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JavaScript Interacting with the DOM Responding to Events Listening for Events with addEventListener()

Posted by Samuel Kleos
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Samuel Kleos
Front End Web Development Techdegree Student 12,719 Points

.getElementsByTagName() vs .querySelectorAll()

In practical terms, if I append an item to a new Nodelist that I want to store somewhere else on the page, what is the benefit of having a live node item, vs a static one?

Ie.

Live Node Item: document.getElementsByTagName('li')[0]

vs

Static Node Item: document.querySelectorAll('li:nth-child(1)')

Also is there a difference if I add event listeners to array items by looping over an HTML Collection vs Static Nodelist?

1 Answer

Travis Alstrand
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STAFF
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Travis Alstrand
Treehouse Teacher
Travis Alstrand
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Travis Alstrand
Treehouse Teacher

Hey there Samuel Kleos !

I was getting ready to type out a big response but I found these two pages which honestly explain the differences much better than I ever could :smiley:

They're both easy reads and shared more info than I was able to think of as well. I hope these shed new light!

Article on medium.com

Article on softauthor.com